Is CVE-2026-42294 actively exploited?

No active exploitation of CVE-2026-42294 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42294 be exploited remotely?

Yes. CVE-2026-42294 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-42294?

CVE-2026-42294 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-42294

HIGH

CVE-2026-42294

CWE-770Published: May 9, 2026· Updated: May 14, 2026

7.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.8th

Official Description

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to versions 3.7.14 and 4.0.5, the Webhook Interceptor loads the entire request body into memory before authenticating the request or verifying its signature. This occurs on the /api/v1/events/ endpoint, which is publicly accessible (albeit intended for webhooks). An attacker can send a request with an extremely large body (e.g., multiple gigabytes), causing the Argo Server to allocate excessive memory, potentially leading to an Out-Of-Memory (OOM) crash and denial of service. This issue has been patched in versions 3.7.14 and 4.0.5.

NVD Source

Technical Analysis

CVE-2026-42294 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.